Btrfs: remove no longer used member num_dirty_bgs from transaction

The member num_dirty_bgs of struct btrfs_transaction is not used anymore,
it is set and incremented but nothing reads its value anymore. Its last
read use was removed by commit 64403612b73a94 ("btrfs: rework
btrfs_check_space_for_delayed_refs"). So just remove that member.

Signed-off-by: Filipe Manana <fdmanana@suse.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>

diff --git a/fs/btrfs/extent-tree.c b/fs/btrfs/extent-tree.c
index 7b65d5349b91ba2fa67b2469e154a6f068ff1199..7e9ba2f76ac98d804eae6313420013ba892f889e 100644 (file)
--- a/fs/btrfs/extent-tree.c
+++ b/fs/btrfs/extent-tree.c
@@ -6431,7 +6431,6 @@ static int update_block_group(struct btrfs_trans_handle *trans,
                if (list_empty(&cache->dirty_list)) {
                        list_add_tail(&cache->dirty_list,
                                      &trans->transaction->dirty_bgs);
-                       trans->transaction->num_dirty_bgs++;
                        trans->delayed_ref_updates++;
                        btrfs_get_block_group(cache);
                }

diff --git a/fs/btrfs/transaction.c b/fs/btrfs/transaction.c
index 722ebdc024532c54572f35b14b78907aceffc719..3f6811cdf803bb0896af7d6dcda81b3ecc17dd90 100644 (file)
--- a/fs/btrfs/transaction.c
+++ b/fs/btrfs/transaction.c
@@ -233,7 +233,6 @@ loop:
        INIT_LIST_HEAD(&cur_trans->io_bgs);
        INIT_LIST_HEAD(&cur_trans->dropped_roots);
        mutex_init(&cur_trans->cache_write_mutex);
-       cur_trans->num_dirty_bgs = 0;
        spin_lock_init(&cur_trans->dirty_bgs_lock);
        INIT_LIST_HEAD(&cur_trans->deleted_bgs);
        spin_lock_init(&cur_trans->dropped_roots_lock);

diff --git a/fs/btrfs/transaction.h b/fs/btrfs/transaction.h
index 4419a4a0294bc3ae08ccec63f373b007f1e3ef12..78c446c222b7d5556a98bbdad928a9d60775a5b6 100644 (file)
--- a/fs/btrfs/transaction.h
+++ b/fs/btrfs/transaction.h
@@ -80,7 +80,6 @@ struct btrfs_transaction {
         */
        struct mutex cache_write_mutex;
        spinlock_t dirty_bgs_lock;
-       unsigned int num_dirty_bgs;
        /* Protected by spin lock fs_info->unused_bgs_lock. */
        struct list_head deleted_bgs;
        spinlock_t dropped_roots_lock;